Perhyte

And MATLAB appears to produce 51, wtf idk

The numeric value of the ‘1’ character (the ASCII code / Unicode code point representing the digit) is 49. Add 2 to it and you get 51.

C (and several related languages) will do the same if you evaluate '1' + 2.

Fun fact: apparently on x86 just MOV all by itself is Turing-complete, without even using it to produce self-modifying code (paper, C compiler).

No standard abbreviation exists for nautical miles but definitely don’t use nm because newton metres

Since as you mentioned Newtons are N not n, Newton meters are Nm. nm means nanometer.

If you’re using OpenSSH, the IdentityFile configuration directive selects the SSH key to use.

Add something like this to your SSH config file (~/.ssh/config):

Host github.com
  IdentityFile ~/.ssh/github_rsa

Host gitlab.com
  IdentityFile ~/.ssh/gitlab_rsa

This will use the github_rsa key for repositories hosted at github.com, and the gitlab_rsa key for repositories hosted at gitlab.com. Adjust as needed for your key names and hosts, obviously.